JP2950415B1 - Flute excavator - Google Patents

Abstract

The present invention provides a flute excavator that can excavate a lower part of an obstacle from the ground even if there is an obstacle at a site where a water blocking wall is constructed underground. The excavator is provided so as to be able to ascend and descend along a guide steel material built in a previously excavated pit adjacent to an obstacle, and excavates a continuous groove under an underground obstacle. In the excavator, a chainsaw cutter unit 4 is provided on a cutter head unit (3) provided at a tip of a suspension frame (1) so as to be able to undulate, and the chainsaw cutter unit (4) is provided with a parent chainsaw provided at a central portion. (5) and the child chainsaw (6) provided on both sides of the parent chainsaw (5).
a, 6b).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flute excavator equipped to be able to ascend and descend along a guide steel material built in a pre-drilled pit, and more particularly to a flute installed on the ground or underground. The present invention relates to a flute excavator that is preferably used when constructing a water blocking wall under a buried obstacle.

[0002]

2. Description of the Related Art When constructing an underground water blocking wall, a continuous vertical hole is excavated from above with a clamshell bucket or the like, and a solid material such as mortar is poured into the vertical hole to form the water blocking wall underground. The method of construction is commonly practiced.

However, when an underground obstacle such as a structure installed on the ground or a box culvert buried underground intersects with a water barrier to be constructed, and becomes a long obstacle,
In place of the water stop wall, a ground improvement method was used in which a chemical solution was injected in advance to solidify the surrounding area or a cement-based solidified material was injected at high pressure.

In a method of constructing a water blocking wall using a clamshell bucket excavator or the like, a continuous pit can be effectively excavated in the case where there is no obstacle underground. If there is an obstacle such as a box culvert, the lower part cannot be directly excavated by a bucket excavator or the like.

Therefore, when there is an obstacle, a chemical solution is injected and solidified, or a cement-based solidifying material is injected at a high pressure to dispose the solid columnar in a columnar manner to form a columnar type water blocking wall. I had to help.

[0006] However, the pillar row wall is more wasteful than a continuous water stop wall having the same thickness, and there is a problem in terms of cost.

[0007]

SUMMARY OF THE INVENTION In the present invention, even if there is an obstacle installed on the ground or an obstacle buried underground at a site where a water blocking wall is constructed underground, the lower part of the obstacle can be seen from the ground. It is an object of the present invention to provide a trench excavator capable of excavating.

[0008]

According to the present invention, there is provided a flute excavator equipped so as to be able to ascend and descend along a guide steel material (C) built in a previously excavated shaft (B). Control valve chamber (2) at the lower part of the suspension frame (1)
A cutter head portion (3) is provided at a lower portion of the control valve chamber (2), and a chainsaw cutter portion (4) is provided on the cutter head portion (3) so as to be able to move up and down, and the chainsaw cutter portion (4) is provided. Consists of a main chain saw (5) provided in the center and child chainsaws (6a, 6b) provided on both sides thereof. The chainsaw cutter (4) has a pair of hydraulic cylinders (5) provided in a cutter head (3). 7a and 7b), and the cutter head (3) has a chainsaw cutter (4).
And a drive sprocket wheel (1) driven by the hydraulic motor (8).
0) drives the chain of the parent chainsaw (5) which is stretched between the idler sprocket wheel (11) and the idler sprocket wheel (11) rotates the sprocket wheels (12a, 12a) provided on both sides.
b) to rotate their sprocket wheels (12
a, 12b) are the upper sprocket wheels (13a,
13b) and the child chainsaw (6a,
The chain 6b) is driven to rotate.

[0009]

[0010]

Therefore, a guide steel material is erected in a pre-drilled pit adjacent to the obstacle, and the chainsaw excavator is lowered in the pit along the guide steel material with the tip of the chainsaw cutter part downward. When the chainsaw excavator passes the obstacle, excavate while raising the chainsaw cutter, raise the chainsaw cutter to the horizontal position, and lower the chainsaw excavator along the guide steel with the chainsaw cutter raised to the horizontal position. Then, a continuous ditch below the obstacle is excavated. After the excavation is completed to the design depth, a water-blocking sheet is inserted, and a solidifying material such as mortar is poured into the water-blocking wall.

[0012]

1 to 3 show a flute excavator according to an embodiment of the present invention. A control valve chamber 2 is provided below a suspension frame 1 and a cutter is provided below the control frame. A head section 3 is provided, and a chainsaw cutter section 4 is provided on the cutter head section 3 so that the chainsaw cutter section 4 can be raised and lowered.

The chain saw cutter unit 4 includes a main chain saw 5 provided at the center and child chainsaws 6a and 6b provided on both sides of the main chain saw 5, and a pair of hydraulic cylinders 7a provided on the cutter head unit 3. It turns 90 degrees by the expansion and contraction of 7b.

The cutter head 3 is provided with a hydraulic motor 8 for driving the chainsaw cutter 4. The hydraulic motor 8 rotates the drive sprocket wheel 10 via spur gears 9a, 9b, 9c. The parent chainsaw 5 spanned between the drive sprocket wheel 10 and the idler sprocket wheel 11
Drive the chain.

The sprocket wheels 12 provided on both sides by rotation of the idler sprocket wheel 11
a, 12b rotate, and the sprocket wheel 12
a, 12b and upper sprocket wheels 13a, 13
b) to rotate the chains of the child chainsaws 6a and 6b that have been bridged between them.

For the elongation of the chain, the adjusting nut 1
4 and the adjustment bolt 15 are used to adjust the tension. The driving power is provided by installing a hydraulic unit on the ground, supplying hydraulic oil to the hydraulic motor 8 through the control valve chamber 2 via a hydraulic hose, and supplying and discharging oil to and from the hydraulic cylinders 7a and 7b.

Next, with reference to FIGS. 4 to 11, an operation of excavating under the underground obstacle by the above-mentioned chainsaw excavator and constructing a water blocking wall under the underground obstacle will be described.

In the example shown in FIGS. 4 and 5, a shaft (guide hole) B is drilled adjacent to the box culvert A on both sides thereof. (FIG. 6) In the pit B, the guide steel material C equipped with the mud pipe D is built. (FIG. 7) The chainsaw excavator E is lowered in the vertical hole B along the guide steel material C in a state where the tip of the chainsaw cutter unit is downward, and when the chainsaw excavator E passes the box culvert A, the chainsaw cutter unit And raise the chainsaw cutter to a horizontal position. (FIG. 8) With the chainsaw cutter raised to the horizontal position, the chainsaw excavator E is lowered along the guide steel C to excavate the continuous groove F below the box culvert A. It falls into the pit B and the cuttings are discharged to the ground by a drain pipe. (Fig. 9) After the excavation is completed to the design depth, the impermeable sheet G is inserted and built. (FIG. 10) A solidification material H such as mortar is cast to form a water stop wall. (Figure 1
1) The method of inserting the impermeable sheet G is shown in FIG. And lower it using the crane I. At this time, the shaft 21 around which the impermeable sheet G is wound is set downward as shown by the two-dot chain line in FIG.

After being lowered to a predetermined position, the water-impervious sheet G
Is raised up to the horizontal direction by the hydraulic cylinder 22, as shown by the solid line in FIG.

After raising, the hydraulic motor 23 is rotated to rotate the shaft 21 around which the impermeable sheet G is wound, so that the impermeable sheet G is unwound and built in the continuous groove. (A weight is installed at the bottom of the seat.) After the impermeable sheet G arrives at the bottom of the groove, the sheet is suspended from the ground by a hanger, and the building machine 2
0, the sheet winding shaft 21 is folded downward, and the
Raise 0. Hydraulic cylinder 22 and hydraulic motor 23
Is installed with a hydraulic unit 24 on the ground, connected with a hydraulic hose, and driven. Further, the shaft 21 around which the impermeable sheet G is wound is rotated by the rotation of the hydraulic motor 23 being transmitted by a gear.

[0021]

According to the present invention, it is possible to excavate a continuous ditch below an underground obstacle, even if the obstacle is long and intersects with the water stop wall to be constructed.

Since the chainsaw cutter is composed of the parent chainsaw and the child chainsaws provided on both sides thereof, the excavation width (width of the continuous wall) can be increased.

[Brief description of the drawings]

FIG. 1 is a side view of a flute digging machine embodying the present invention, with a chainsaw cutter section horizontal.

FIG. 2 is a front view showing a state in which the chainsaw cutter unit of FIG. 1 is vertical.

FIG. 3 is a plan view of FIG. 1 as viewed from above.

FIG. 4 is a plan view showing an arrangement of a flute excavator and the like when constructing a water blocking wall below an underground obstacle implementing the present invention.

FIG. 5 is a side view of FIG. 4;

FIG. 6 is an explanatory view showing a place where a vertical hole is drilled according to the present invention.

FIG. 7 is an explanatory view showing a place where guide steel materials are being built according to the present invention.

FIG. 8 is an explanatory view showing a place where a chainsaw excavator is being built according to the present invention.

FIG. 9 is an explanatory view showing a place where continuous wall drilling is performed according to the present invention.

FIG. 10 is an explanatory view showing a place where a waterproof sheet is built according to the present invention.

FIG. 11 is an explanatory view showing a place where a solid material such as mortar is cast according to the present invention.

FIG. 12 is a side view showing a state in which the impermeable sheet according to the present invention is erected.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Suspension frame 2 ... Control valve room 3 ... Cutter head part 4 ... Chainsaw cutter part 5 ... Parent chainsaw 6 ... Child chainsaw 7 ... Hydraulic cylinder 8 ... Hydraulic pressure Motor 9 ・ ・ ・ Spur gear 10 ・ ・ ・ Drive sprocket wheel 11 ・ ・ ・ Idler sprocket wheel 12 ・ ・ ・ Sprocket wheel 13 ・ ・ ・ Sprocket wheel 14 ・ ・ ・ Adjustment nut 15 ・ ・ ・ Adjustment bolt 20 ・ ・ ・ Shield Water sheet construction machine 21 ... Shaft 22 ... Hydraulic cylinder 23 ... Hydraulic motor 24 ... Hydraulic unit A ... Box culvert B ... Vertical hole C ... Guide steel D ... Exhaust pipe E: chainsaw excavator F: continuous wall G: impermeable sheet H: mortar I: crane

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Ito 2-28 Asahimachi, Omuta-shi, Fukuoka Prefecture Mitsui Miike Works Co., Ltd. Miike Works (72) Inventor Makoto Kanazaki Nihonbashi Muromachi 2-chome, Chuo-ku, Tokyo No. 1 in the Mitsui Miike Works Co., Ltd. (56) References JP 4-41753 (JP, B2) JP 50-2521 (JP, B1) (58) Fields surveyed (Int. Cl. ⁶ , (DB name) E02F 5/06 E02F 5/02

Claims (1)

(57) [Claims] 1. A flute excavator equipped so as to be able to ascend and descend along a guide steel material (C) built in a previously excavated shaft (B), a control is provided at a lower portion of a suspension frame (1). A valve chamber (2) is provided, a cutter head section (3) is provided below the control valve chamber (2), and a chainsaw cutter section (4) is provided in the cutter head section (3) so as to be able to undulate. The cutter part (4) is composed of a parent chainsaw (5) provided at the center part and child chainsaws (6a, 6b) provided at both sides thereof, and the chainsaw cutter part (4) is provided at the cutter head part (3). A pair of hydraulic cylinders (7a, 7b)
The cutter head (3) is provided with a hydraulic motor (8) for driving a chainsaw cutter (4). The drive sprocket wheel (10) driven by the hydraulic motor (8) is an idler sprocket wheel. (11), the chain of the parent chain saw (5) is rotated, and the rotation of the idler sprocket wheel (11) rotates the sprocket wheels (12a, 12b) provided on both sides, and these sprockets The wheel (12a, 12b) rotates the chain of the child chainsaw (6a, 6b) suspended between the upper sprocket wheel (13a, 13b) and the adjusting nut (14) for adjusting the tension of the chain. And an adjustment bolt (15).